Sawmill set-works.



L. J. HANHART.

SAWMILL SET WORKS. IPPLIOATIQN IILEI) SEPT.25, 1909.

1,024,775. PtentedApnSO, 1912.

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L. J. HANHART.

SAWMILL SET WORKS.

APPLIOATIOK FILED SEPT. 25, 1909.

Patented Apr.-30,1912.

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UNTTED STATES PATENT OFFIOE.

LOUIS J. HANI-IART, OF CINCINNATI, OHIO, 'ASSIGNOR TO J. A. FAY & EGANCOMPANY,

OF CINCINNATI, OHIO, A CORPORATION OF WEST'VIRGIN IA.

SAWMILL :snrwo-ims.

Specification of Letters Patent.

Patented Apr. 30, 1912.

Application filed September 25, 1909. Serial No. 519,591.

To all whom it may concern:

Be it known that I, LOUIS J. HANHART, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Sawmill Set-WVorks, of which the following is a specification.

My invention relates to sawmill set-works, and has for its object theprovision of novel and improved means whereby setting of the knees isaccomplished accurately and the distances of advance of the kneescontrolled in major steps capable of subdivision into minor steps innovel manner for permitting accurate control of the distances ofapproach of the knees toward the saw-blade.

The inventionwill be readily understood from the following descriptionand claims, and from the drawings, in which latter:

Figure 1 is a side elevation of my invention, shown in connection withso much of a sawmill as is necessary to illustrate its application. Fig.2 is a plan view of the same. Fig. 3 is an enlarged side elevation ofthe operating lever, partly broken away, and showing the means forcontrolling its limits of movements; and, Fig. 4 is a longitudinalsection of the same on the line z2 of Fig. 3.

1 represents a sawmill carriage which is operable lengthwise, as ontracks 2, back and forth across the position of the sawblade indicatedat 3. The carriage has thereon suitable setting-knees 4 which aremovable crosswise of the carriage, a suitable number of setting-kneesbeing employed. The setting-knees are instanced as stock or log-securingparts which have movement toward and from the saw-blade position. Thesetting-knees may be slidable on headblocks 5 and operated by aset-shaft 6 which has suitable connection with the settingknees formoving the same toward the sawblade position. Thus each setting-knee hasa rack 7 with which a pinion 8 on the setshaft meshes, the setting-kneessliding on a guide-way 9 on the head-block. The setting-knees may bereturned to initial position in a suitable manner, as by a spring 10 ina usual manner.

For moving the setting-knees toward the saw-blade position I provide anoperating lever 11 which has suitable connection with the set-shaft 6.This connection between the operating lever and the set-shaft maycomprise a shaft 12 and pinions 13 14, shown as segment-pinions,rockable about the shaft 12, one of the pinions having a bracket 15 onits hub into which the operating lever is received. The pinions aresuitably secured together for moving in unison, as by providing one ofthe pinions with a lug 16 and the other of the pinions with lugs 17 18,set-screws 19 20 being received in the lugs 17 18 for impinging againstthe lug 16 and thereby permitting adjustment between the segment-pinions13 14 about their rotary axes and causing said pinions to move inunlson.

21 22 are gears, shown as segment-gears, journaled about the set-shaft6. The segment-pinion 13 meshes with the segmentgear 21. Thesegment-pinion l4 meshes with a gear 23 mounted on a shaft 24 and inturn meshing with the segmentgear 22. These parts may be mounted inside-frames 25 26 having bearings 27 for the set-shaft, bearings 28 forthe shaft 12, and bearings 29 for the shaft 24.

31 is a ratchet-wheel secured to the set shaft, with which suitablepawls on the segment-gears are arranged to make engagement. Thus thesegment-gear 22 may carry pawls 32 33 on studs 34 35. In theconstruction shown one of the pawls engages the teeth of theratchet-wheel while the other is in mid-position, suitable means beingprovided for throwing the pawls out of engagement with theratchet-wheel. Thus the pawl 32 is provided with a heel 36 adapted toengage a heel 37 on the pawl 33.

38 is a cam having a flat face 39 for permitting the pawls to engage theratchetwheel and provided with a handle 40 for causing the cam-facethereof to engage the heel 36, thereby depressing both heels anddisengaging both pawls. A spring 41 located between the heel 36 and thepawl 33 urges the pawls into engagement with the teeth of theratchet-wheel. The segmentgear 22 is provided with similar pawls andattendant parts indicated by similar but primed reference numerals.

For controlling the movements of the setting-knees I provide a stop withrelation to which the operating lever has movement, the stop beingadjustable for major divisions of angular movement of the operatinglever, and a further stop provided with adjustable engaging faces forsubdividing said major divisions of angular movement of the operatinglever into minor divisions thereof. Thus at is a bracket on one of thesideframes and has an arc-piece 47 thereon provided with a series ofapertures a8 spaced apart at equidistant angles with relation to thepivot of the operating lever, which operates adjacent to said are. A pin49 is selectively received into said apertures and forms a stop for thethrow of the operating lever. A main stop for controlling the majordivisions of travel. of said operating lever and of travel of thesettingknees is thus provided. For subdividing these major divisions oftravel, I provide a supplemental stop shown as a block on said operatinglever adjustable for presenting different points thereof to said step.Thus 51 is a block which is provided with a series of engaging faces orpoints of which there may be a suitable number, exemplified at 52 52 5252 The block is adjustable on the lever for presenting any of said engaging points or faces to the main stop &9. Thus the block has a guideway53 therein through which the operating lever is received for permittingthe block to be moved lengthwise of the operating lever. For positioningthe block at suitable points lengthwise of the operating lever, inpositions for selectively bringing the engaging faces, which may bestepped, into obstructing range of the stop 49, I provide obstructingparts between the operating lever and block. Thus 54L is a tootharranged to selectively engage notches in the operating lever. The tooth54: is shown on a lever 56 pivoted to the block at 57 and having ahandle 58 adjacent to the handle 59 for moving the block, a spring 60between said levers urging the tooth into engagement with the notches,and the handles being relatively so disposed that the hand in graspingthe operating handle 59, will also encompass the handle 58.

61 a permanent stop for the backward throw of the lever. It ispreferably adjustable to take up wear of the parts. It is shown as aslide having an engaging face 62 thereon and adjustable on a lug 63 ofthe arc-piece by means of a belt 6 1 threaded. in a lug 65 of the slideand impinging the lug 63, a clamp-bolt 66 being received through a slot67 in the slide into said lug 63, for clamping the permanent stop in ad}justed position.

In operation, if it is desired to adjust the range of movement of theoperating lever for major divisions of angular movement thereof, themain stop or pin 49 is selectively placed into one of the apertures 48and the block 51 adjusted into normal position on the operating leverfor causing for instance the face 52 thereof to engage the main stop orpin. Each of these major divisions may be the equivalent of a resultanttravel in the setting-knees for instance of one-fourth inch. These majordivisions may be subdivided into suitable minor divisions by theprovision of the movable engaging faces on the operating lever which maybe brought into selective engagement with the pin 49 by adjustment ofthe block 51 on the operating lever. Each of these minor divisions ofangular movement of the lever may be instanced as resulting in steps ofone thirtysecond inch of movement in the knees. These divisions may bevaried and the resultant step-by-step movements of the knees may besubdivided into minute subdivisions if desired.

By means of my improved device I am enabled to provide delicate andaccurate adj ustments of angular throw of the operating lever and.resultant travel of the settinglrnees, enabling me to provide smalldifferences in the step-bystep travel of the setting-knees by mechanismwhich is simple and economical in construction and accurate in results.

Having thus fully described my invention, what I claim as new and desireto se cure by Letters Patent is:

1. In a manually operated sawmill setworks, the combination of asettingknee, an operating lever having operative connection with saidsetting-knee for setting the same, an adjustable permanent stop, a majordivision stop, said operating lever having angular movement bet-weensaid stops, means for adjusting said major-division stop for majordivisions of movement of said settingknee, a contact-block mounted onand moving with said operating lever, said contactblock havingcontact-points thereon for minor divisions of movement of saidsettingknee at one side of said contact-block cooperating with saidmajor-division stop, and means for adjusting said block on said leverfor placing selective ones of said contactpoints into contacting rangewith said major-division stop for controlling minor divisions ofmovementof said setting-knee, and said contact-block having acontact-face at its opposite side contacting said permanent stop atsimilar lever positions throughout the range of adjustments of saidcontact-blocl 2. In a manually operated sawmill setworks, thecombination of a setting-knee, an operating lever having operativeconnection with said setting-knee for setting the same, a stop for majordivisions of movement of said setting-knee, means for adjusting saidstop for said major divisions, a block, said block and operating leverhaving a guide way therebetween extending lengthwise of said lever andmovable with said lever, said guide-way comprising a guide-face movableinto various angular distances with relation to said stop, said blockprovided with contact-faces, and means for adjusting said block on saidguide-face and lever for placing said contact-faces on said blockselectively in range with said stop for minor adjustments of movement ofsaid setting-knee, and the said guide-way arranged for receiving theblow of contact of said block with said stop in a directionsubstantially perpendicular to said guide-face.

3. In a manually operated sawmill setworks, the combination of asetting-knee, an operating lever having operative connection with saidsetting-knee for setting the same, a stop for major divisions ofmovement of said setting-knee, means for adjusting said stop for saidmajor divisions, a block, said block and operating lever having aguideway therebetween extending lengthwise of said lever and movablewith said lever, said guide-way comprising a guide-face movable intovarious angular distances from said stop, said block provided withsuperposed contact-faces, and means for adjusting said block lengthwiseof and on said operating lever for placing said contact-faces on saidblock selectively in range with said stop for minor divisions ofmovement of said settingknee.

l. In a manually' operated sawmill setworks, the combination of asetting-knee, an

operating lever having operative connect-ion with said setting-knee forsetting the same, a stop for major divisions of movement of saidsetting-knee, means for adjusting said stop for said major divisions, ablock, said block and operating lever having a guideway therebetweenextending lengthwise of said lever and movable with said lever, saidguide-way comprising a guide-face movable into various angular distanceswith relation to said stop, said block provided with superposed steppedcontact-faces, said contactfaces being located in the angle between saidstop and guideface, and means for adjusting said block lengthwise of andon said operating lever for placing said stepped contact-faces on saidblock selectively in range with said stop for minor divisions ofmovement of said setting-knee, and the said guide-face arranged forreceiving the blow of contact of said block with said stop in adirection substantially perpendicular to said guide-face.

In testimony whereof, I have signed my name hereto in the presence oftwo subscribing witnesses.

LOUIS J. HANHART.

Witnesses:

RICHARD D. CoAN, HARPER G. Ross.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

